Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Day Zero approaches as Cape Town’s water runs out
Cape Town - the South African city of 3.7 million people - is on the verge of running out of water. Day Zero is the day the taps will get turned off.
February 11, 2018
Somber Betelgeuse in Orion’s shoulder
Betelgeuse's red color indicates a star well into the autumn of its years. In fact, the star is a magnificently rare red supergiant.
February 11, 2018
Where is Elon Musk’s car going?
It was meant to go into an orbit that would take it past Mars, but where's it going really? Plus, see outer space from the vantage point of Starman, the mannequin in Elon Musk's red Tesla Roadster, and much more.
February 10, 2018
Martian dust cascades
This image from NASA's Mars Reconnaissance Orbiter (MRO) shows streaks forming on slopes when dust cascades downhill.
February 10, 2018
Moon closest to Saturn before sunup February 11
Saturn is the most distant and slowest-moving world that you can easily see with the unaided eye. Let the moon show it to you Sunday morning.
February 10, 2018
What is radiocarbon dating?
At a very steady rate, unstable carbon-14 gradually decays to carbon-12. The ratio of these carbon isotopes reveals the ages of some of Earth's oldest inhabitants.
February 9, 2018
Åhus tree
Stefan Nilsson 's annual winter image of this tree, on the beach in Åhus, Sweden.
February 9, 2018
View of Winter Olympics from space
Ready for the Olympics? Here's a look at the sites of the 2018 Winter Games, the South Korean cities of Pyeongchang and Gangneung, from above.
February 8, 2018
Harvard study links breast cancer to light at night
Artificial light has transformed the night sky, a change researchers continue to link to health problems.
February 8, 2018
Moon and planets before sunup February 9 to 11
Now the moon has moved in the predawn sky. You'll find it moving past the planet Mars - toward Saturn - on the mornings of February 9 to 11, 2018.
February 8, 2018
